I have written two webservices. One containing a EJB and a SOAP-Webservice and one with just a SOAP-Webservice.
If I call the EJB-Version the webservice gets inizialized by glassfish on the first call and then stays running (Constructor is not called any more) but if I call the SOAP-only service constructor is called on every method-call.
Therefore I have a deployment-problem with the EJB-Version: I use SQL-Server-JDBC-Libs in my Netbeans-Project. The get deployed to the server but are not used by the application. Instead I have to copy them to the servers lib-directory. If I deploy them with my Soap-only-service they work...

As you can see I already tried to add the sql-code to query the database. I added the mysql.jar to the project and deployed it. Using the tester the Service- and POJO-Object gets initialized only once but I cant use the mysql-driver cause it is not used on the server. But it gets deployed to the server... I think it's just not included in the class-path...